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Downlink pilot frequency collocation method, base station and mobile terminal

A pilot configuration and mobile terminal technology, applied in electrical components, wireless communication, etc., can solve the problems of high CSI-RS resource occupation and inflexible configuration, and achieve the effect of avoiding uncertain problems and reducing overhead

Inactive Publication Date: 2013-08-14
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a downlink pilot configuration method and a base station and a mobile terminal to solve the problem of high CSI-RS resource occupation and inflexible configuration in heterogeneous network or complex network structure scenarios

Method used

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  • Downlink pilot frequency collocation method, base station and mobile terminal
  • Downlink pilot frequency collocation method, base station and mobile terminal
  • Downlink pilot frequency collocation method, base station and mobile terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] like Figure 4 As shown, the process of adding a new node in the existing network.

[0056] exist figure 1 Introducing a new node anywhere in the network shown involves the following steps:

[0057] S101, a new node is established, and the used CSI-RS configuration set and the unused CSI-RS configuration set of adjacent nodes or nodes in the entire area are exchanged, and the combination of the two sets is initialized to all CSI-RS configurations specified in the protocol.

[0058] S102: Select a configuration orthogonal to the used CSI-RS configuration from the unused CSI-RS configuration set as the temporary CSI-RS configuration of the node, and add the temporary configuration to the temporary used CSI-RS configuration set .

[0059] S103, the base station notifies the UE under the current node to measure the CSI-RS of the adjacent node, and the terminal selects and reports the CSI-RS configuration with the RSRP value greater than the threshold T according to the t...

Embodiment 2

[0066] like Figure 5 As shown, the difference from Embodiment 1 is that the objects configured in this embodiment are nodes that already exist in the existing network but need to be re-optimized for configuration. Such operations are initiated, for example, when the CSI measurement performance of a node is degraded or the CSI-RS configuration in the allocation area needs to be re-optimized due to changes in other conditions. The basic steps are as follows:

[0067] S201, the base station side decides according to channel information, UE performance statistics, etc., or initiates actions of re-measurement and configuration optimization for the CSI-RS configuration of the current node, or periodically, or through a configuration instruction.

[0068] S202, the base station side selects a configuration orthogonal to the used CSI-RS configuration set from the unused CSI-RS configuration set as the temporary CSI-RS configuration of the node, and notifies other nodes to add this t...

Embodiment 3

[0076] User-level CSI-RS configuration process.

[0077]The configuration process is similar to Embodiment 1 and Embodiment 2, except that the CSI-RS configuration in this embodiment is a user-level configuration, that is, a strategy is used for each user to perform the CSI-RS configuration. In this manner, the CSI-RS configuration sets on the time-frequency resources where each UE is located may be different.

[0078] S301, in the initial state, the base station selects a configuration orthogonal to the used CSI-RS configuration from the unused CSI-RS configuration set of the UE as the temporary CSI-RS configuration of the user, and adds this temporary configuration to the temporary used CSI -RS configuration collection.

[0079] S302 , the base station notifies the UE of the measurement set, including the frequency domain location, the cell identifier, and the CSI-RS configuration, and the UE measures and reports the CSI-RS configuration whose RSRP value is greater than the...

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Abstract

The invention discloses a downlink pilot frequency collocation method, a base station and a mobile terminal, wherein the base station notifies a terminal under a target node of carrying out pilot frequency receiving power measurement to CSI-RS of adjacent node of the target node, the terminal reports a measured CSI-RS resource collocation mode with pilot frequency receiving power larger than a default threshold to the base station, and the base station counts the CSI-RS collocation with the pilot frequency receiving power larger than the default threshold and selects a CSI-RS collocation orthogonal to the CSI-RS collocation with the pilot frequency receiving power larger than the default threshold from the CSI-RS collocation assemblage used by the target node to collocate to the target node. According to the invention, CSI-RS collocation can be accomplished automatically in a scene with a more complex network structure, so as to obtain space multiplexing gain, meanwhile, the expense of CSI-RS can be reduced at the same time, and the problems of complexity of the CSI-RS orthogonal collocation and uncertainty caused by the complexity can be avoided.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a downlink pilot frequency configuration method, a base station and a mobile terminal. Background technique [0002] Long Term Evolution Advanced (LTE-Advanced) strengthens the consideration of indoor and hotspot scenarios. For example, in Heterogeneous Networks scenarios, some macro cells with lower transmit power are introduced. , such as Picocells, Femtocells, and Relays for signal relay. This network structure can significantly improve the system throughput and improve the overall efficiency of the network, and can better meet the requirements of LTE-Advanced. [0003] These low-power nodes have small coverage and flexible deployment, and can well achieve coverage in indoor and hotspot areas. However, this changed network structure and flexible network deployment may bring about interference between macro cells and micro cells, between micro cells, or betwe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W24/00
Inventor 卢有雄贺抗生王文焕姚珂
Owner ZTE CORP
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